Shiva Purana
आग्नेयकोष्ठमध्ये तु पीताभे चतुरस्रके ॥ अष्टपत्रं लिखेत्पद्मं रक्ताभं पीतकर्णिकम् ॥ १६ ॥
In the yellow square in between the south-east squares a lotus of eight petals shall be drawn red in colour with yellow pericarp.
english translation
AgneyakoSThamadhye tu pItAbhe caturasrake ॥ aSTapatraM likhetpadmaM raktAbhaM pItakarNikam ॥ 16 ॥
hk transliteration by Sanscript